单项选择题
A.make-up B.desired value C.deviation D.set value
With UMS, when the engine room is unwatched （） will con...
单项选择题With UMS, when the engine room is unwatched （） will control the main engine.
A.the bridge officer on watch B.the chief engineer C.the duty engineer D.the duty motorman
（） handle and instruments are on the front.A.openB.open...
单项选择题（） handle and instruments are on the front.
A.open B.open front type C.live front type D.None of the above
The （） is a crystal which, under pressure, produces an ...
单项选择题The （） is a crystal which, under pressure, produces an electric current which varies with the pressure.
A.alternator B.glass thermometer C.burdon tube D.piezoelectric pressure transducer
